Seal-press.



M. SHERAS.

SEAL PRESS.

APPLICATION FILED MAR. 9, 1911.

W//L'ejs/ Y l. f

Patented Jan. 2, 1912.

UNITED STATES PATENT OFFICE.

MORRIS SHERAS, 0F CHICAGO, ILLINOIS.

SEAL-PRESS.

T 0 all whom t may concern:

Be it known that I, MORRIS SHERAS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in SeaLPresses, of which the following is a specification.

My invention relates to seal presses and contemplates improved features of construction, arrangement and operation.

One object of my invention is to provide a compact, simple and light device which at the same time is very strong and powerful.

Another object is to provide for swing of the lever arm in a direction parallel with the die and matrix instead of in a direction at right angles therewith, this making the press more flat. and less bulky and of neater design.

Another object is to provide means for locking the swinging lever arm in closed position to thereby keep the die and matrix together when not in use and to thus keep out dirt and foreign matter which might interfere with proper impressioning.

Another object is to provide for a large range of movement of the die with comparative small angle of swing of the lever arm.

In general the object is to produce a press of more desirable shape, design and operation.

In the accompanying drawings: Figure 1, is a plan view showing the press in closed position, Fig. 2, is a side elevational view thereof, Fig. 3, is a sectional view taken on plane 3 3 Fig. 1, and, Fig. 4, is a sectional view looking from plane 4 4, Fig. 3.

The body of the press consists of upper and lower frames 5 and 6 connected along a horizontal plane 7 by screws 8 8 and a pin 9 extending through lug 10 on frame 6 and into frame 5 as shown. The upper frame 5 expands at its fro-nt end into an inverted cylindrical head or cup 11 having the central opening 12. Through this opening projects the upper end of the plunger cylinder 13 whose base 14 has the central opening 15 for receiving the plunger head 16 extending upwardly from the die 17. A screw 18 fits in the cylinder 13 and engages the. plunger head, and a compression spring 19 between the screw head and the base 14 of the cylinder 13 tends to raise the die against the lower end of the cylinder.

The outer end of the cylinder has ex- Specicaton of Letters Patent.

Application led March 9, 1911.

Patented Jan. 2, 1912.

Serial No. 613,423.

ternal threads 20 for receiving a cap 21.'

An annular lug or flange 22 extends from the cylinder and abuts against the top of the head 11 as the screw cap 21 is tightened, the cylinder being thus anchored in place. The annular lug or flange 22 has diametrically opposite ears 23 and 24 having respectively semispherical pockets 25 and 26 in their undersides for accommodating bearing balls 27 and 28. The die 17 has a central circular raised portion 29 forming an annular bearing shoulder 30y for the annular cam plate 31 seating on the die. This cam plate has two diametrically opposite inclined plane or cam ridge portions 32 and 33 for coperating with the balls 27 and 28 to force the die downwardly upon rotation of the cam plate.

The lower frame 6 expands at its front end into a shallow cylindrical cup 34 forming a pocket for the matrix 35. The base 36 of the cup is preferably corrugated concentrically to be strong and to offer a secure sea-l for the matrix which coperates with the lowered die to produce the seal impressions on material inserted thereover.

An arm 37 extends from one side of the head 11 and along and beyond one side of the body parts and may be integral with the upper body part. A lever 38 has the same general shape as arm 37 and its front end is secured to or formed integral with the cam plate 31 which extends at one side between the head 11 and cup 34, as best shown in Fig. 4. Fig. 4 shows the lever swung away from the press body and the cam ridges 32 and 33 have their lowest ends adjacent the bearing balls and the die is consequently in its upper position away from the matrix.. When the lever is swung inwardly the cam ridges are carried below the balls to gradually but powerfully force the die downwardly toward the matrix to the position shown in Figs. 2 and 3. To prevent turning of the die a pin 40 secured in the die extends upwardly and is slidable through hole 41 in the head 11. Also to strengthen the frames a rib 42 extends along the top frame 5 and divides into branches 43 and 44 on the head l1. The lower frame 5 has a strengthening rib 45.

It is desirable to keep the die and matrix clean when the press is not in use and I therefore provide lock mechanism for holding the lever 38 in closed position against the press body. The lever has a tongue 46 with a side slot 4:7 for receiving the end of a bolt 48 slidable by means of knob 4.9 in a frame 50 secured to the' top frame 5. Fig. 1 shows the lever thus locked, and Figs. 2 and 3 show the corresponding engaging positions of the die and matrix. This press thus closed can also be more readily transported or carried in ones pocket.

I do not desire to be limited to the precise construction and arrangement shown as changes can be readily made which will still come within the scope of my invention and I therefore claim the following:

l. In a seal press, the combination of a supporting frame comprising upper and lower body parts each having a circular extension at its front end, said extensions being concentric and opposite each other but separated a distance, a matrix secured to the lower extension, a cylinder carried by the upper extension and concentric therewith, a die plate between the lower end of said lcylinder and said matrix and having a stem extending into said cylinder, spring means within the cylinder tending to force said die plate upwardly away from the matrix, said die plate having an annular bearing shoulder, a cam plate encircling said shoulder and seating on said die plate, bearing pockets rigid with reference to the top extension and accommodating bearing balls, said cam plate having cam, extensions for cooperating with said balls upon rotation of the cam plate to'cause said die plate to be forced downwardly toward said matrix, a grip arm parallel with said press frame and secured to one side thereof, and a lever arm extending from said cam plate for causing rotation of said cam plate.

2. In a seal press, the combination of a su ortino frame com risin u er and rated a distance, a matrix on the lower extension, .said upper extension having a central opening, a cylinder concentric with said matrix and having its upper end extending through said opening, bearing pockets extending from said cylinder to engage with the lower face of said upper extension, the outer vend of' said cylinder being threaded, a cap engaging said threaded end and the outer face of said upper extension for locking the cylinder securely to said extension, bearing balls in said bearing pockets, a die plate between said matrix and the lower end of said cylinder and having a stem extending through thebase of said cylinder and into said cylinder, an abutment on said stem and within said cylinder, a compression spring between said abutment and cylinder base tending to hold said die plate in upper position away from the matrix, a cam plate encircling the die plate stem and having cam ridges for cooperating with said bearing balls upon rotation of the cam plate to cause said die plate to be forced downwardly toward the matrix, a grip arm at one side of the seal frame, and a grip lever extending from said cani plate for causing rotation of said cam plate.

In witness whereof I have signed my name to the foregoing specification in the presence of two subscribing witnesses.

MORRIS SHERAS.

Witnesses:

R. E. Knr-Ion,l A. J. GOLDFINE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

- Washington, D. C. 

